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South African class 19D
This was the last iteration in the class 19 series of branch line 4-8-2 locomotives with a lighter axle load than the class 15. Designed by W.A.J. Day, it was based on the 19C, but had Walschaert valve gear instead of...
| South African class 19DRemove | |
|---|---|
| Variant | MX tender |
| Built | 1937-1949 |
| Manufacturers | Krupp;Borsig;Škoda;Robert Stephenson & Hawthorns;North British |
| Wheel arrangement | 2D1 |
| Gauge | 1067 mm |
| Length | 26273 mm |
| Service mass | 80877 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | South African class 19DMX tender |
|---|---|
| Built | 1937-1949 |
| Manufacturers | Krupp, Borsig, Škoda, Robert Stephenson & Hawthorns, North British |
| Wheel arrangement | 4-8-2 (Mountain) |
| Gauge | 1,067 mm |
Dimensions and weights
| Property | South African class 19DMX tender |
|---|---|
| Length | 26.27 m |
| Wheelbase | 9.83 m |
| Total wheelbase | 23.37 m |
| Service mass | 80.9 t |
| Adhesion mass | 56.2 t |
| Total mass | 155.4 t |
| Rigid wheelbase | 4.39 m |
| Axle load | 14.2 t |
| Water capacity | 29,549 l |
| Fuel capacity | 12.2 t (coal) |
Boiler
| Property | South African class 19DMX tender |
|---|---|
| Grate area | 3.345 m² |
| Firebox surface | 12.914 m² |
| Tube heating surface | 157.935 m² |
| Evaporative heating surface | 170.849 m² |
| Superheater surface | 36.232 m² |
| Total heating surface | 207.1 m² |
Power plant
| Property | South African class 19DMX tender |
|---|---|
| Driver diameter | 1,372 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 533 x 660 mm |
Power
| Property | South African class 19DMX tender |
|---|---|
| Power source | steam |
| Estimated power | 1,044 kW (1,419 PS) |
| Starting effort | 160.6 kN |
Calculated values
| Property | South African class 19DMX tender |
|---|---|
| Factor of adhesion | 1 : 3.44 |
| Optimal speed | 40 km/h |
| Power-to-weight ratio | 12.9 kW/t |
| Heating Surface Equivalent | 307.9 m² |
| Cylinder volume/HSE | 1 : 958.62 |
| Adhesive weight/Total | 1 : 1.44 |
| Tractive force/Heating surface | 1 : 16.19 |
| Grate area/Heating surface | 1 : 61.91 |
| Firebox/Tube surface | 1 : 12.23 |
| Total/Superheater | 1 : 4.72 |
